+ init-mainc-silence-some-wunused-parameter-warnings.patch added to -mm tree

[akpm@xxxxxxxxxxxxxxxxxxxx]

The patch titled
     Subject: init/main.c: silence some -Wunused-parameter warnings
has been added to the -mm tree.  Its filename is
     init-mainc-silence-some-wunused-parameter-warnings.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/init-mainc-silence-some-wunused-parameter-warnings.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/init-mainc-silence-some-wunused-parameter-warnings.patch

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------------------------------------------------------
From: Andrew Halaney <ahalaney@xxxxxxxxxx>
Subject: init/main.c: silence some -Wunused-parameter warnings

There are a bunch of callbacks with unused arguments, go ahead and silence
those so "make KCFLAGS=-W init/main.o" is a little quieter.  Here's a
little sample:

init/main.c:182:43: warning: unused parameter 'str' [-Wunused-parameter]
static int __init set_reset_devices(char *str)

Link: https://lkml.kernel.org/r/20210519162341.1275452-1-ahalaney@xxxxxxxxxx
Signed-off-by: Andrew Halaney <ahalaney@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 init/main.c |   25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

--- a/init/main.c~init-mainc-silence-some-wunused-parameter-warnings
+++ a/init/main.c
@@ -179,7 +179,7 @@ EXPORT_SYMBOL_GPL(static_key_initialized
 unsigned int reset_devices;
 EXPORT_SYMBOL(reset_devices);
 
-static int __init set_reset_devices(char *str)
+static int __init set_reset_devices(char *str __always_unused)
 {
 	reset_devices = 1;
 	return 1;
@@ -229,13 +229,13 @@ static bool __init obsolete_checksetup(c
 unsigned long loops_per_jiffy = (1<<12);
 EXPORT_SYMBOL(loops_per_jiffy);
 
-static int __init debug_kernel(char *str)
+static int __init debug_kernel(char *str __always_unused)
 {
 	console_loglevel = CONSOLE_LOGLEVEL_DEBUG;
 	return 0;
 }
 
-static int __init quiet_kernel(char *str)
+static int __init quiet_kernel(char *str __always_unused)
 {
 	console_loglevel = CONSOLE_LOGLEVEL_QUIET;
 	return 0;
@@ -478,7 +478,7 @@ static void __init setup_boot_config(voi
 	get_boot_config_from_initrd(NULL, NULL);
 }
 
-static int __init warn_bootconfig(char *str)
+static int __init warn_bootconfig(char *str __always_unused)
 {
 	pr_warn("WARNING: 'bootconfig' found on the kernel command line but CONFIG_BOOT_CONFIG is not set.\n");
 	return 0;
@@ -504,7 +504,8 @@ static void __init repair_env_string(cha
 
 /* Anything after -- gets handed straight to init. */
 static int __init set_init_arg(char *param, char *val,
-			       const char *unused, void *arg)
+			       const char *unused __always_unused,
+			       void *arg __always_unused)
 {
 	unsigned int i;
 
@@ -529,7 +530,8 @@ static int __init set_init_arg(char *par
  * unused parameters (modprobe will find them in /proc/cmdline).
  */
 static int __init unknown_bootoption(char *param, char *val,
-				     const char *unused, void *arg)
+				     const char *unused __always_unused,
+				     void *arg __always_unused)
 {
 	size_t len = strlen(param);
 
@@ -723,7 +725,8 @@ noinline void __ref rest_init(void)
 
 /* Check for early params. */
 static int __init do_early_param(char *param, char *val,
-				 const char *unused, void *arg)
+				 const char *unused __always_unused,
+				 void *arg __always_unused)
 {
 	const struct obs_kernel_param *p;
 
@@ -1343,8 +1346,10 @@ static const char *initcall_level_names[
 	"late",
 };
 
-static int __init ignore_unknown_bootoption(char *param, char *val,
-			       const char *unused, void *arg)
+static int __init ignore_unknown_bootoption(char *param __always_unused,
+					    char *val __always_unused,
+					    const char *unused __always_unused,
+					    void *arg __always_unused)
 {
 	return 0;
 }
@@ -1482,7 +1487,7 @@ void __weak free_initmem(void)
 	free_initmem_default(POISON_FREE_INITMEM);
 }
 
-static int __ref kernel_init(void *unused)
+static int __ref kernel_init(void *unused __always_unused)
 {
 	int ret;
 
_

Patches currently in -mm which might be from ahalaney@xxxxxxxxxx are

init-print-out-unknown-kernel-parameters.patch
init-mainc-silence-some-wunused-parameter-warnings.patch